SpringBoot之ActiveMQ实现延迟消息

一、安装activeMQ

​ 安装步骤参照网上教程，本文不做介绍

二、修改activeMQ配置文件

​ broker新增配置信息 schedulerSupport="true"

<broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost" dataDirectory="${activemq.data}" schedulerSupport="true" >

<destinationPolicy>
<policyMap>
<policyEntries>
<policyEntry topic=">" >
<!-- The constantPendingMessageLimitStrategy is used to prevent
slow topic consumers to block producers and affect other consumers
by limiting the number of messages that are retained
For more information, see:

http://activemq.apache.org/slow-consumer-handling.html

-->
<pendingMessageLimitStrategy>
<constantPendingMessageLimitStrategy limit="1000"/>
</pendingMessageLimitStrategy>
</policyEntry>
</policyEntries>
</policyMap>
</destinationPolicy>

三、创建SpringBoot工程

1. 配置ActiveMQ工厂信息，信任包必须配置否则会报错

package com.example.demoactivemq.config;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.RedeliveryPolicy;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.ArrayList;
import java.util.List;

/**
* @author shanks on 2019-11-12
*/
@Configuration
public class ActiveMqConfig {

@Bean
public ActiveMQConnectionFactory factory(@Value("${spring.activemq.broker-url}") String url){
ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(url);
// 设置信任序列化包集合
List<String> models = new ArrayList<>();
models.add("com.example.demoactivemq.domain");
factory.setTrustedPackages(models);

return factory;
}

}

1. 消息实体类

package com.example.demoactivemq.domain;

import lombok.Builder;
import lombok.Data;

import java.io.Serializable;

/**
* @author shanks on 2019-11-12
*/

@Builder
@Data
public class MessageModel implements Serializable {
private String titile;
private String message;
}

1. 生产者

package com.example.demoactivemq.producer;

import lombok.extern.slf4j.Slf4j;
import org.apache.activemq.ScheduledMessage;
import org.apache.activemq.command.ActiveMQQueue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jms.JmsProperties;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.stereotype.Service;

import javax.jms.*;
import java.io.Serializable;

/**
* 消息生产者
*
* @author shanks
*/
@Service
@Slf4j
public class Producer {

public static final Destination DEFAULT_QUEUE = new ActiveMQQueue("delay.queue");

@Autowired
private JmsMessagingTemplate template;

/**
* 发送消息
*
* @param destination destination是发送到的队列
* @param message     message是待发送的消息
*/
public <T extends Serializable> void send(Destination destination, T message) {
template.convertAndSend(destination, message);
}

/**
* 延时发送
*
* @param destination 发送的队列
* @param data        发送的消息
* @param time        延迟时间
*/
public <T extends Serializable> void delaySend(Destination destination, T data, Long time) {
Connection connection = null;
Session session = null;
MessageProducer producer = null;
// 获取连接工厂
ConnectionFactory connectionFactory = template.getConnectionFactory();
try {
// 获取连接
connection = connectionFactory.createConnection();
connection.start();
// 获取session，true开启事务，false关闭事务
session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
// 创建一个消息队列
producer = session.createProducer(destination);
producer.setDeliveryMode(JmsProperties.DeliveryMode.PERSISTENT.getValue());
ObjectMessage message = session.createObjectMessage(data);
//设置延迟时间
message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, time);
// 发送消息
producer.send(message);
log.info("发送消息：{}", data);
session.commit();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (producer != null) {
producer.close();
}
if (session != null) {
session.close();
}
if (connection != null) {
connection.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

1. 消费者

package com.example.demoactivemq.producer;

import com.example.demoactivemq.domain.MessageModel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;

/**
* 消费者
*/
@Component
@Slf4j
public class Consumer {

@JmsListener(destination = "delay.queue")
public void receiveQueue(MessageModel message) {
log.info("收到消息:{}", message);
}
}

1. application.yml

spring:
activemq:
broker-url: tcp://localhost:61616

1. 测试类

package com.example.demoactivemq;

import com.example.demoactivemq.domain.MessageModel;
import com.example.demoactivemq.producer.Producer;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@SpringBootTest(classes = DemoActivemqApplication.class)
@RunWith(SpringRunner.class)
class DemoActivemqApplicationTests {

/**
* 消息生产者
*/
@Autowired
private Producer producer;

/**
* 及时消息队列测试
*/
@Test
public void test() {
MessageModel messageModel = MessageModel.builder()
.message("测试消息")
.titile("消息000")
.build();
// 发送消息
producer.send(Producer.DEFAULT_QUEUE, messageModel);
}

/**
* 延时消息队列测试
*/
@Test
public void test2() {
for (int i = 0; i < 5; i++) {
MessageModel messageModel = MessageModel.builder()
.titile("延迟10秒执行")
.message("测试消息" + i)
.build();
// 发送延迟消息
producer.delaySend(Producer.DEFAULT_QUEUE, messageModel, 10000L);
}
try {
// 休眠100秒，等等消息执行
Thread.currentThread().sleep(100000L);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}

执行结果

2019-11-12 22:18:52.939  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 发送消息：MessageModel(titile=延迟10秒执行, message=测试消息0)
2019-11-12 22:18:52.953  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 发送消息：MessageModel(titile=延迟10秒执行, message=测试消息1)
2019-11-12 22:18:52.958  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 发送消息：MessageModel(titile=延迟10秒执行, message=测试消息2)
2019-11-12 22:18:52.964  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 发送消息：MessageModel(titile=延迟10秒执行, message=测试消息3)
2019-11-12 22:18:52.970  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 发送消息：MessageModel(titile=延迟10秒执行, message=测试消息4)
2019-11-12 22:19:03.012  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延迟10秒执行, message=测试消息0)
2019-11-12 22:19:03.017  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延迟10秒执行, message=测试消息1)
2019-11-12 22:19:03.019  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延迟10秒执行, message=测试消息2)
2019-11-12 22:19:03.020  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延迟10秒执行, message=测试消息3)
2019-11-12 22:19:03.021  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延迟10秒执行, message=测试消息4)

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